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以嵌段共聚物 F127为软模板,低分子量酚醛树脂为前驱体,通过溶剂挥发诱导自组装(EISA)方法制得介孔碳(OMC),经浸渍还原法制备介孔碳负载铂催化剂(Pt/OMC )。采用场发射扫描电镜(FESEM)、X射线能谱(EDS)、透射电镜(TEM)、X射线衍射(XRD)、N2吸附-脱附等温线等对其进行了表征。Pt/OMC对甲醛的催化性能结果表明,反应7h甲醛的去除率可达92.5%,甲醛可矿化为 CO2。还研究了甲醛的降解机理,甲醛首先被氧化成甲酸,然后再矿化为CO2和 H2 O。

The ordered mesoporous carbon was synthesized with triblock copolymer pluronic 127 as the soft tem-plate,phenolic resins with low molecular weight as carbon sources via the evaporation induced self-assembly route.The ordered mesoporous carbon supported platinum (Pt)catalyst (Pt/OMC)was prepared by chemical reduction method,characterized by scanning electron microscope (FESEM),energy dispersive X-ray spectros-copy (EDS),transmission electron microscope (TEM),X-ray diffraction (XRD)and nitrogen adsorption-de-sorption isotherm.The catalytic activity of Pt/OMC on formaldehyde was investigated.It indicated that Pt/OMC had excellent catalytic activity,and the removal rate on formaldehyde was more than 92.5% in 7h.More-over,it could be mineralized to carbon dioxide.High performance liquid chromatography (HPLC)and gas chromatography (GC)were used to investigate the reaction mechanism for degrading formaldehyde,revealing that the formaldehyde was first decomposed into formic acid,then mineralized to carbon dioxide and water.

参考文献

[1] Xuehua Yu;Junhui He;Donghui Wang .Facile Controlled Synthesis of Pt/MnO2 Nanostructured Catalysts and Their Catalytic Performance for Oxidative Decomposition of Formaldehyde[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2012(1):851-860.
[2] 崔丹丹,蒋剑春,孙康,卢辛成.竹活性炭负载二氧化钛光催化降解水溶液中甲醛的研究[J].功能材料,2011(z3):438-441.
[3] Zhenping Qu;Shijin Shen;Dan Chen.Highly active Ag/SBA-15 catalyst using post-grafting method for formaldehyde oxidation[J].Journal of molecular catalysis, A. Chemical,2012:171-177.
[4] Baocang Liu;Changyan Li;Yifei Zhang.Investigation of catalytic mechanism of formaldehyde oxidation over three-dimensionally ordered macroporous Au/CeO2 catalyst[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2012:467-475.
[5] Kim Junhyung;Lee Seungwoo;Christopher Carlton et al.Pt-covered multiwall carbon nanotubes for oxygen re-duction in fuel cell applications[J].The Journal of Physi-cal Chemistry Letters,2011,2:1332-1336.
[6] Li Haibo;Pan Likun;Lu Ting et al.A comparative study on electrosorptive behavior of carbon nanotubes and graphene for capacitive deionization[J].Journal of Elec-troanalytical Chemistry,2011,653:40-43.
[7] Tsuyoshi Kijima;Yu Nagatomo;Hirokatsu Takemoto;Masafumi Uota;Daisuke Fujikawa;Yuzo Sekiya;Teppei Kishishita;Makoto Shimoda;Takumi Yoshimura;Hideya Kawasaki;Go Sakai .Synthesis Of Nanohole-structured Single-crystalline Platinum Nanosheets Using Surfactant-liquid-crystals And Their Electrochemical Characterization[J].Advanced functional materials,2009(4):545-553.
[8] Sang Hoon Joo;Jeong Young Park;Chia-Kuang Tsung .Thermally stable Pt/mesoporous silica core-shell nanocatalysts for high-temperature reactions[J].Nature materials,2009(2):129-131.
[9] Wu, Z.;Lv, Y.;Xia, Y.;Webley, P.A.;Zhao, D. .Ordered mesoporous platinum@graphitic carbon embedded nanophase as a highly active, stable, and methanol-tolerant oxygen reduction electrocatalyst[J].Journal of the American Chemical Society,2012(4):2236-2245.
[10] Wen ZH;Liu J;Li JH .Core/shell Pt/C nanoparticles embedded in mesoporous carbon as a methanol-tolerant cathode catalyst in direct methanol fuel cells[J].Advanced Materials,2008(4):743-747.
[11] Gaurav Gupta;Daniel A. Slanac;Pavan Kumar .Highly Stable Pt/Ordered Graphitic Mesoporous Carbon Electrocatalysts for Oxygen Reduction[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2010(24):10796-10805.
[12] 水质甲醛的测定乙酰丙酮分光光度法[S].
[13] Wan Ying;Shi Yifeng;Zhao Dongyuan .Supramolecular aggregates as templates:oedered mesoporous polymers and carbons[J].Chemistry of Materials,2008,20:932-945.
[14] Taiwo O. Alaje;Keith Scott;P. Maiyalagan .Highly Stable Pt-Ru Nanoparticles Supported on Three-Dimensional Cubic Ordered Mesoporous Carbon (Pt-Ru/CMK-8) as Promising Electrocatalysts for Methanol Oxidation[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2012(3):2630-2638.
[15] J.R.C.Salgado;R.G.Duarte;L.M.Ilharco .Effect of functionalized carbon as Pt electrocatalyst support on the methanol oxidation reaction[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2011(3/4):496-504.
[16] Jing Wei;Qin Yue;Zhenkun Sun .Synthesis of Dual-Mesoporous Silica Using Non-Ionic Diblock Copolymer and Cationic Surfactant as Co-Templates[J].Angewandte Chemie,2012(25):6149-6153.
[17] 冯斌,邵华,程学美.高效液相色谱法测定尿中甲酸和乙酸[J].中国卫生检验杂志,2006(02):207-208.
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